1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5538d37a904f3e74749862cba2463c7eb196a4265d20ad3c9c41cae5f0cdace2. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/46d79a4b-5d96-4eae-8685-c2376784b8cb.json and https://artists.proofprofile.net/proofs/artist/46d79a4b-5d96-4eae-8685-c2376784b8cb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe195760ca50fd933ca9a4b7946efb90afc54ac0ae7de370ca50bf0609a22fc54. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4Q1854241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83b4617e0bea63b0c6c398d76385f46053bf26942efce0572bd2b3035f191186. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4Q1854243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aba090d7b2c828e21a4130e75f2612794edecc61166b2d40646636655ed1f2e. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4Q1854244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c90d295b2fc2fe5cee14a18e64e921a47e0c7acecbfe510756e21b73752ad6. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:46:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4Q1854245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c61ee0f34c3bfd46f1c45e7bc8e5f1b62842cc1c62a3488d9dc9c9b87f3586. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4Q1854247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f582d7ffd8b2de2452cdedabb0eb822cc8ddaf9589b6eba9049dba47d3b262. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USL4Q1854249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72fa8c026273ea0b761b7baf12fb6686ca54070e0aa8c0acf5527cbdf0bdc8b4. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ2049775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11febb0d4aa31c3ba53efb3a43c9eccdd38e6d326f721b0224b73eedf4b584d0. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ2049776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13475a3562e0a74bcbb06dfe1c9c1d91b36751e7969355f4d0df0b0e116a6abf. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ2049777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe27a9985e9ba09f7dbd9fbb68319e84212f72b34fe973c8f8aa9a07fee56eb6c. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ2049779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe7832a4ead66463b61dc1f6ee4af10e6868e46712e54f34aed10c0232fcacec. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ2049781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ebc9fc2fbee2068fa9c1cc8fc1537b9618ef81bf8126bfc2ac127a26292014. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:10:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM22127465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e6839a013dba00f34294069609e2b8432993bbfabbe2289244e9e0e03bc8e4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM22218298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5529ca56914708f64a9c722c58e2a2507a737f41cdf3628e1687657f886f547. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM22218300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e40da9e85b5cdb8c00eeea748f208cf0100910837922c47d8b9838b27f4e99. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM22218303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x650b28f3f0d91c1debf90d9b13e7cc8383f57a460b49fb12e6105b3e5253981d. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:16:14Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM22218304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde604fd632a5588460d3cb0e436e7ab2876a4fe900962a895d6d778c34f42328. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM22218306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa39dae8482565694c0b171775f8b552bb13e418bffd774dfaeca60aa7de1de. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM22218307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb3062b8356c66ef7d6a96aa348f94f0b2138751fe06579a9dc19a6ebbc19305. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT3TB2426633.